DESCRIPTION
The M51971 is  a  semiconductor integrated circuit designed to control the motor rotating speed.
The built-in FG amplifier with high gain enables to use a wide range of rotating speed detector (FG detector).
Use of less external parts enables DC motors to be controlled with high precision.

FEATURES
● Wide range of supply voltage• • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4–17.5V
● Variation coefficient of supply voltage•••••±0.005%/V(standard)
● Load variation coefficient•••••±0.01%(standard,full loadrange)
● Temperature coefficient of rotating speed • • • • 7ppm/˚C (standard)
● Built-in high performance FG amplifier

APPLICATION
Motor rotating speed control in floppy disk driver, player, tape recorder, car stereo, etc.